攀钢转炉双渣法脱磷的试验研究

 为满足用户对钢中磷含量的要求，攀钢采用“双渣法”转炉脱磷工艺开展脱磷试验，并根据生产条件和转炉工艺特点考察转炉脱磷专用氧枪的实际使用效果。试验中，转炉工艺冶炼前期低温脱磷，后期脱碳升温，吹炼前期采用低供氧强度脱磷喷枪，倒渣时切换为常规吹炼喷枪。在吹炼脱磷前期结束扒渣后，熔池中的w(［P］)下降至0040%以下，脱磷率为47.9%。在试验终点钢水中的w(［P］)均在0.010%以下，波动范围在0.006%~0.010%，w(［P］)的平均值是0.0081%。终点脱磷率波动范围是84.4%~92%，平均值是88.3%。

Experimental Investigation on Dephosphorization for Converter Using Double Slag Process in Pangang

In order to satisfy the requirements of consumers on phosphorus content in steel,dephosphorization tests using double slag dephosphorization method in BOF were carried out in Pangang Group Company Ltd.,as well as investigation on actual use effects of BOF dephosphorization special oxygen lance according to production conditions and process features of BOF.During the tests,dephosphorization was done at the earlier low temperature stage and decarbonization which led to higher temperature was done at the later stage.The special oxygen lance with low oxygen supply was used at the earlier stage and then was replaced by the routine oxygen lance in the later deslagging period.Phosphorus content in steel had dropped to below 0.040% and the dephosphorization ratio was 47.9% after slagging-off while dephosphorizing prior period finished.At the end of BOF,w([P]) had declined to less than 0.010%,waving in the range from 0.006% to 0.010%,and the average w([P]) was 0.0081%.Dephosphorization ratio was between 84.4% and 92% at the BOF end and for the average of 88.3%.